40
Introduction
Section 3-1
3-1
Introduction
This section discusses the operational aspects of using the PRT1-SCU11 and
the configuration software. The section has been setup, to follow the general
process flow of setting up and configuring a network, downloading the config-
uration, and operating the PROFIBUS network, the Compoway-F, K-Format,
Host Link or Memobus network.
The PROFIBUS Master can communicate with the PRT1-SCU11 using fixed
communication block and/or Free Communication blocks.
In case Error messages are displayed, while using CX-Profibus, refer to the
appropriate manual for more information on errors.
Note
1.
The maximum number of devices is 15.
2.
The maximum of modules is 18. This number consists of 15 fixed commu-
nication blocks, 1 write, 1 read and 1 operation Free Communication block.
3-2
PROFIBUS Communication
As mentioned in the previous section there are two ways of PROFIBUS com-
munication. Communication with fixed communication blocks and Free Com-
munication blocks.
Fixed Communication
Blocks
Fixed communication blocks are pre-defined blocks of data to be read/written
from/to a device. Fixed communication blocks can not be changed. The most
common data can be read/written using fixed communication blocks.
Example
For an E5ZN connected to the PRT1-SCU11 a 2-channel basic fixed I/O block
defines the data transfer of 1 Setpoint Value for each channel and 1 Process
Value for each channel between the PROFIBUS Master unit and the E5ZN
through the PRT1-SCU11.
Free Communication
Blocks
Free communication blocks are sent directly to the device connected to the
PRT1-SCU11. The PRT1-SCU11 does not interfere with the data contents of
the block. This allows Free Communication blocks to be used to access data
in a device which can not be accessed through fixed communication blocks.
Free Communication Blocks can be used for Compoway-F and the K-Format
protocol.
Flexible Communication
Blocks
Flexible communication blocks are defined for the Memobus protocol and are
a mix between the fixed blocks and the Free Communication blocks. The flex-
ible communication blocks will contain 3 input words and 3 output words, for
each of which a target register in the Varispeed F7 Inverter can be defined.
Maximum PRT1-SCU11
PROFIBUS DP I/O Size
The maximum amount of PROFIBUS data the PRT1-SCU11 can handle is
100 words input data and 100 words100 output data. If more capacity is
needed an extra PRT1-SCU11 is required to access additional devices.
Note As per PROFIBUS DP definition the I/O data words are sent in Big Endian for-
mat, i.e. the high byte is sent first.
Summary of Contents for PROFIBUS DP GATEWAY
Page 1: ...OPERATION MANUAL PROFIBUS DP Gateway to Host Link Compoway F PRT1 SCU11 Cat No W01E EN 02 ...
Page 2: ...PRT1 SCU11 PROFIBUS DP Gateway Operation Manual Revised September 19 2005 ...
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